<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>HTML 符号实体</title>
</head>
<body>

<p>我将显示 &</p>
<p>我将显示 &#8364;</p>
<p>我将显示 &#x20AC;</p>

</body>
</html>